Insert Interpolation Into Matlab Code

Hi, I am new to Matlab programming. The graph result should be have a range of x-asix from -1 to 1, but now the graph is from 0 to 1. I want to set the range for x-axis from -1 to 1. May I know anyone can help me?

This is the current program code.

This is my current result:

Thanks in advance!

[Walter Roberson]

You call interp1 with four numeric values and then the 'spline' method. However interp1 is only defined with at most three numeric values before the method parameter.

[KIEN WEI LAI]

Hi, may I know how can I edit the Matlab code?

[darova]

You mean limits of x?

xlim([-1 1])

Answer 1

[the cyclist]

Here is my best guess at what you should do, to get what you want:

• Take the x argument out of the call to interp1
• Change the definition of interp_no_ding to be interp_no_ding = -1:1/50:1

[KIEN WEI LAI]

Thanks for your help!